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Finding the Fourth Proportional to 639,193.88, 959,218.50 and 265,216.88

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Solution

The fourth proportional to 639,193.88, 959,218.50 and 265,216.88 is: 398,002.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,193.88 : 959,218.50 = 265,216.88 : x
  2. Step 2: Convert to fraction form
    639,193.88/959,218.50 = 265,216.88/x
  3. Step 3: Cross multiply
    639,193.88x = 959,218.50 × 265,216.88
  4. Step 4: Simplify right side
    639,193.88x = 254,400,937,808.28
  5. Step 5: Solve for x
    x = 254,400,937,808.28/639,193.88
  6. Step 6: Final answer
    x = 398,002.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.